<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<ul>
			<li>我</li>
			<li>想</li>
			<li>我</li>
			<li>是</li>
			<li>喜</li>
			<li>欢</li>
			<li>你</li>
		</ul>
	</body>
	<style>
		body {
			margin: 0;
			padding: 0;
			font-family: arial;
		}

		ul {
			position: absolute;
			top: 50%;
			left: 50%;
			transform: translate(-50%, -50%);
			margin: 0;
			padding: 0;
		}

		ul li {
			list-style: none;
			float: left;
			background: #ff85e4;
			padding: 15px 20px;
			font-size: 20px;
			margin: 10px;
			color: #fff;
			animation: animate 1s infinite alternate;
			-webkit-perspective: 500px;
		}

		@keyframes animate {
			from {
				transform: scale(1) translateY(0) rotateX(0deg);
				box-shadow: 0 0 0 rgba(0,0,0,0);
			}

			to {
				transform: scale(1.3) translateY(-25px) rotateX(45deg);
				box-shadow: 0 30px 5px rgba(0,0,0,.1);
			}
		}
		
		ul li:nth-child(1){
			animation-delay: .1s;
		}
		ul li:nth-child(2){
			animation-delay: .2s;
		}
		ul li:nth-child(3){
			animation-delay: .3s;
		}
		ul li:nth-child(4){
			animation-delay: .4s;
		}
		ul li:nth-child(5){
			animation-delay: .5s;
		}
		ul li:nth-child(6){
			animation-delay: .6s;
		}
		ul li:nth-child(7){
			animation-delay: .7s;
		}
	</style>
</html>